Comment on ''Hypothesis‚ÄövÑvÆUltraviolet-B Irradiance and Vitamin D Reduce the Risk of Viral Infections and thus their Sequela, Including Autoimmune Diseases and some Cancers'' by W.B. Grant, Photochem. Photobiol. (2007)e, Including Autoimmune Diseases and some Cancers'' by W.B. Grant, Photochem. Photobiol. (2007)

Grant proposes that vitamin D reduces the risk of viral infections due to its antiviral properties, particularly its ability to promote the production of cathelicidin from infected cells and the production of other antimicrobial peptides. Grant, W. B., C. F. Garland and M. F. Holick (2005) Comparisons of estimated economic burdens due to insufficient solar ultraviolet irradiance and vitamin D and excess solar UV irradiance for the United States.